PIECE of cake to install
all you'll have to do is cut your muffler off and this clamps right on (might have to heat up the metal a bit to make it fit your 325 though... not sure since i cant see the underside of your exhaust). you can probably do it yourself if you are inclined but taking it to any muffler place they'd probably do it for like $50 or so.

sound IS great, not as loud as muffler delete but loud when you want it to be, especially from a stop and full throttle.